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Showing items 1 through 9 of 10.This manual is designed to give detailed, practical advice on the various methodologies of organic recycling. Blue-green algae form a self-sufficient system which is capable of fixing atmospheric nitrogen in organic forms and which grows upon a free water surface.
Revista internacional de silvicultura e industrias forestales
An international journal of forestry and forest industries
This course teaches the farmer about the water cycle. It covers rainfall, ground water, the water table, surface water, evaporation, and transpiration. It also delivers information on wells and springs, swamps, ponds, lakes, streams and rivers. It explains how water is necessary for life.
Le gouvernement d’un pays africain peut adopter une politique de promotion de la transformation en aval de façon à augmenter sa part dans la capacité mondiale de transformation en vue d'accroitre les recettes d’exportation.
An international review of forestry and forest products
Revue internationale des forts et des industries forestires
Revue internationale des forts et des industries forestires
An international review of forestry and forest products